#A0B1AA

CSS

:root {
  --alpine-air: #a0b1aa;
  --alpine-air-rgb: 160 177 170;
  --alpine-air-oklch: oklch(0.745 0.021 169.1);
}

.element {
  color: var(--alpine-air);
  background-color: hsl(155 10% 66%);
  border-color: oklch(0.745 0.021 169.1);
}

Tailwind CSS v4

@theme {
  --color-alpine-air: #a0b1aa;
  --color-alpine-air-50: #eff7f4;
  --color-alpine-air-100: #e1eae7;
  --color-alpine-air-200: #ccd7d3;
  --color-alpine-air-300: #adbbb6;
  --color-alpine-air-400: #93a39c;
  --color-alpine-air-500: #798b84;
  --color-alpine-air-600: #67766f;
  --color-alpine-air-700: #525e59;
  --color-alpine-air-800: #3c4541;
  --color-alpine-air-900: #29302d;
  --color-alpine-air-950: #171c1a;
}

SCSS

$alpine-air: #a0b1aa;
$alpine-air-rgb: 160, 177, 170;
$alpine-air-light: mix(#fff, $alpine-air, 20%);
$alpine-air-dark: mix(#000, $alpine-air, 20%);

.element {
  color: $alpine-air;
  box-shadow: 0 0 0 2px rgba($alpine-air, 0.35);
}